Examine the histogram and focus on the feature most relevant to the researchers' question of whether the birds generalized, specialized, or showed some other pattern of choosing between the producing and scrounging strategies. What best describes this distribution

Which factor contributed to the rise of african empires such as ghana and mali ? a. their creation and involvement in trade networks b. they focused only on agricultural production. c. they didn’t engage in warfare with other nations d. their geographic location protected them from attacks.